could drop
Verbo regular: drop - dropped- dropped

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could drop
you could drop
she could drop
we could drop
you could drop
they could drop 	I could be dropping
you could be dropping
she could be dropping
we could be dropping
you could be dropping
they could be dropping	I could have dropped
you could have dropped
she could have dropped
we could have dropped
you could have dropped
they could have dropped	I could have been dropping
you could have been dropping
she could have been dropping
we could have been dropping
you could have been dropping
they could have been dropping	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not drop
you could not drop
she could not drop
we could not drop
you could not drop
they could not drop 	I could not be dropping
you could not be dropping
she could not be dropping
we could not be dropping
you could not be dropping
they could not be dropping	I could not have dropped
you could not have dropped
she could not have dropped
we could not have dropped
you could not have dropped
they could not have dropped	I could not have been dropping
you could not have been dropping
she could not have been dropping
we could not have been dropping
you could not have been dropping
they could not have been dropping	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I drop?
could you drop?
could she drop?
could we drop?
could you drop?
could they drop? 	could I be dropping?
could you be dropping?
could she be dropping?
could we be dropping?
could you be dropping?
could they be dropping? 	could I have dropped?
could you have dropped?
could she have dropped?
could we have dropped?
could you have dropped?
could they have dropped? 	could I have been dropping?
could you have been dropping?
could she have been dropping?
could we have been dropping?
could you have been dropping?
could they have been dropping? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not drop?
could you not drop?
could she not drop?
could we not drop?
could you not drop?
could they not drop? 	could I not be dropping?
could you not be dropping?
could she not be dropping?
could we not be dropping?
could you not be dropping?
could they not be dropping? 	could I not have dropped?
could you not have dropped?
could she not have dropped?
could we not have dropped?
could you not have dropped?
could they not have dropped? 	could I not have been dropping?
could you not have been dropping?
could she not have been dropping?
could we not have been dropping?
could you not have been dropping?
could they not have been dropping?